The resistance of a resistance thermometer has values 2-71 and 3-70 ohm at 10- C and 100- C- The temperature at which the resistance is 3-26 ohm isA- 50- CB- 40- CC- 60- CD- 70- C

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Standard IX

Physics

Resistance Thermometers

The resistanc...

Question

The resistance of a resistance thermometer has values 2.71 and 3.70 ohm at $10^{\circ} C a n d 100^{\circ} C$ . The temperature at which the resistance is 3.26 ohm is

40°C

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50°C

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60°C

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70°C

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Solution

The correct option is B
50°C

Change in resistance 3.70 - 2.71 = 0.99 $Ω$ corresponds to interval of tempetature $90^{\circ} C$ .

So change in resistance 3.26 - 2.71 = 055 $Ω$ corresponds to change in temperature

= $\frac{90}{0.99} \times 0.55 = 50^{\circ} C$

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The resistance of a resistance thermometer has values 2.71 and 3.70 ohm at 10∘C and 100∘C. The temperature at which the resistance is 3.26 ohm is

The correct option is B 50°C Change in resistance 3.70 - 2.71 = 0.99 Ω corresponds to interval of tempetature 90∘C . So change in resistance 3.26 - 2.71 = 055 Ω corresponds to change in temperature = 900.99×0.55=50∘C

The resistance of a resistance thermometer has values 2.71 and 3.70 ohm at $10^{\circ} C a n d 100^{\circ} C$ . The temperature at which the resistance is 3.26 ohm is

The correct option is B
50°C

Change in resistance 3.70 - 2.71 = 0.99 $Ω$ corresponds to interval of tempetature $90^{\circ} C$ .

So change in resistance 3.26 - 2.71 = 055 $Ω$ corresponds to change in temperature

= $\frac{90}{0.99} \times 0.55 = 50^{\circ} C$